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Discount policy
One-group Pretest-posttest Design
An experimental design where a single group of participants is tested before and after an intervention to assess its effect.
Extreme Scores
Extreme scores refer to the most unusually high or low values in a data set, which can significantly influence statistical analyses and interpretations.
Selection Differences
Disparities between groups in an experimental study that can affect the outcome, often resulting from non-random assignment.
Testing Effects
The impact that pre-testing may have on the subjects' performance in subsequent assessments.
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